mt DNA haplogroup A which is widespread in Asia today occurs at levels below 10%, but reaches higher concentrations in some parts of China, Korea and Japan.
“Some ethnic Chinese populations, such as the Dong and the Yi, carry haplogroup A at levels as high as 30%.
The Korean males were characterized by a diverse set of 4 haplogroups (Groups IV, V, VII, X) and 14 haplotypes that were also present in Chinese.
Between 19, a team led by Satoshi Yamaguchi, a researcher at Japan’s National Science Museum, compared Yayoi remains found in Japan’s Yamaguchi and Fukuoka prefectures with those from early Han Dynasty (202 BC-8) in China’s coastal Jiangsu province, and found many similarities between the skulls and limbs of Yayoi people and the Jiangsu remains.
For North Koreans, the frequency of O3a5 is even lower than some Tungusic populations.
Overall, the Koreanic haplogroup O3 were the least influenced by Sinitic populations.
Two Jiangsu skulls showed spots where the front teeth had been pulled, a practice common in Japan in the Yayoi and preceding Jōmon period.
The genetic samples from three of the 36 Jiangsu skeletons also matched part of the DNA base arrangements of samples from the Yayoi remains.